Question

Elements upto atomic number 92 occur in nature except Technetium , Tc

(Z=43) and promethium , Pm(Z=61) ,which are formed from radioactive

elements where ‘ Z’ represents atomic number. These elements are

known as naturally occurring elements. Elements beyond atomic number

92 are man made elements. They are also called synthetic elements.

Atomic number of elements A , B , C and D are given below.

10 , 20 , 7 and 14 .

a) Classify the elements as metals , non metals or metalloid.​

Answer 1

Explanation:

A is Neon, B is Calcium, C is Nitrogen, D is Silicon.

A is nonmetal

B is metal

C is non metal

D is metalloid